Patents by Inventor John G. Lauderdale

John G. Lauderdale has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4199790
    Abstract: The invention relates to a matrix wipe generator for television signals. With matrix switching, the television screen is divided into a plurality of blocks, and, if the screen originally contains the picture A, then picture B is switched into the blocks one at a time until all of the blocks, i.e., the whole screen, are filled with the picture B. The novel generator in accordance with the invention provides waveforms which give a Z-axis wipe effect, that is, the B picture appears to come into the screen from behind the A picture in each block.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: April 22, 1980
    Assignee: Central Dynamics Ltd.
    Inventors: Raymond L. Greenfield, John G. Lauderdale